Traction-machine



N. NILSON.

' TRACTION MACHINE.

APPLICATION FILED MAR. 6, 1915- v 1,321,987. Patented Nov. 18,1919.

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OOOOOOOO N. NILSON.

TRACTION MACHINE.

APPLICATION nuzo MAR. 6. 1915.

Patented Nov. 18, 1919.

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TRACTION MACHINE.

APPLICATION FILED MAR. 6, 19:5.

Patented Nov. 18, 1919.

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N. m sou. .TRACTION MACHINE. APPLICATION FILED MAR. 6, 1915.

Patented Nov. 18, 1919.

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Specification of Letters Patent.

Application filed March a. 1915. Serial 110.1234).

To all whom it may concern:

Be it known that I, N1Ls NILSON, citizen of the United States, resident of Wayzata, county of Hennepin, State of Minnesota, have invented certain new and useful Improvements in Traction-Machines, of which the following is a specification.

The object of my invention'is to provide a traction machine or engine capable of use in various ways but particularly adapted for plowing.

A further object is to provide an engine in which the traction wheels are arranged in front, with means for applying the draft of the plows to increase the traction of the wheels.

A further object is to provide a means for increasing the traction which will also tend to relieve the weight on the steering wheel to facilitate turning of the same.

The invention consists generally in various constructions and combinations, all

as hereinafter described and particularlypointed out in the claims.

In the accompanying drawings forming part of this specification, I

Figure 1 .is a plan view of a tractionengine embodying my invention,

Fig. 2 is 'a longitudinal sectional view of the same, 3

Fig. 3 is a similar view taken along another section line, illustrating the drive mechanism and the details of the steering device,

Fig. 4 is a front elevation, partially in section, of the machine,

Fig. 5 is a plan 'iew, showingthe traction wheels oscillate to make a quick turn.

In the, drawing, 2 represents a frame, rec-- tangular substantially in form, and composed preferably of channel bar. 3 and 4 are axle sections, placed end to end, with the differential 5-of ordinary construction between them. Hubs 6 are mounted on the axle sections and are provided with arms 7 connected by vertical pivots 8 with similar arms 9 on the hubs ofthe traction wheels 10. The'hubs 6 are connected with one another across the machine by an arched yoke 11 and braces 12 and 13 connect the frame 2 on opposite sides of the machine, with the outer portions of the hubs 6. Slee'ves 14 and 15 are provided on the" axle sectionsand on which the hubs 6 are mounted, and

collarsv 16 have bearings on the inner portions of the sleeves 14 and '15 above the frame2 and have upper'portions that are securely bolted to an upper or supplemen tary frame 17. This frame is ada ted to swing on the sleeves14 and 15 Whic form a fulcrum therefor. The gear 18 of the differential meshes with a pinion 19 on a shaft Patented N ov.'18-, 191s.

20 that is provided with beveled [gears 21 and 22. A driving shaft 23 has a pinion 24 to mesh with either one of the gears 21 and 22 and a clutch 25 connects the driving shaft with an internal combustion engine 26 that is mounted on the middle portion of the frame 17 in the rear ofthe'traction wheel axles. The gears 21 and 22 are mounted on a collar 26 which is adapted.

to slide on the shaft 20 and is provided with a clutch operating device 27 attached to an operating lever, not shown. A' similar clutch-operating device 28 is provided in connection with the clutch 25. The shaft 20 is also preferably provided with a pulley 29 for transmitting power through a belt,

not shown, for operating some piece of ma- 4 chinery when the traction engineis stationary. An oil reservoir 30 is mounted on the frame 17 'in. front of the axle and in the rear of-the engine, as shown. Hangers 31 are secured at their upper ends to the frame 1 17 and are preferably Y-shaped and 'arranged to straddle the axle and depend be low the same and the frame 2, having a row of holes 31 to receive the ends of the draft bar 32, which also has holes 33 therein for attaching the plows 34 thereto.

The superstructure frame 17 has the function substantially of a scale beam fulcrumed on the axle sections and when strain is aplifted, but the tendency of the pull ofthe draft connections on the forward portion of this frame would be to exert a lifting action on the rear portion and at the same time draw down on thexforward portion of the frame and increase the traction of the wheel.

The draft connection 32 extends rearwardly'under the rear portion of the frame 2 and beneath the axle 35 of a steering wheel 36 that is mounted in a forkf37, the upper portion ofwhich has a flat bearing surface 38 seated on the underside of a plate 39 that is secured to the rear portion of the frame 2. A stud 4O depends through the plate 39 and is secured to the upper portion of the fork 37- and carries a, segmental gear 41- wh1ch meshes with a pinion 42 on the lower end of a steering post 43, the upper portion of which has the usual hand wheel 44 convenient to the drivers seat 45. Y

Mounted on the stud 40 is'a rock bar 46 having link connections 47 connecting the ends of the rockfbar .with arms 48 which project inwardly from the pivots of the traction wheels 10, thereby insuring the rock-7' tween the rear portions of the frames 2 and i further pull on the draft connections will be draft bars will not be sufiicient may require.

17 and a bolt 51 is carried by the frame 17 and adapted to slide on the frame 2 and has a stop 52 for limiting the upward movement of the bolt. This upper frame is pivoted by means of the collars 16 on the sleeves 14 and 15 and consequently can swing vertically, being cushioned by the springs 50 at the rear of the machine and limited againstextreme upward movement at said rear end by the bolts 51. The draft bar connectedtothelower ends of the hangers 31 will, when strain is put upon them by the plows 34, draw backwardly and downwardly on the frame 17 and tend to swing it on its fulcrum and exert a' lifting action on the rear portion of this frame and increase the traction of the forward wheels, and the reater the ull on the hangers, the greater t e lifting effect on the rear portion of the frame and the more res-' sure there will be on the forward whee s to force them into the soil. Should the superstructure frame be raised by the pull of the draft connections, the stop on the bolt 51 will engage the platform of the frame 2and transmitted to the main frame of the machine. Generally, however, the pull on the to lift either one'of these frames.

By an adjustment ofthe drag bar 32 on the hangers, their leverage on the frame 17 can be increased or decreasec-Las conditions In various ways the details of construction herein shown and described may be modified and still be within the scope of myinven- I claim as my invention:

1. A traction machine comprising a frame having forward traction wheels and 'a rear guiding means, a member fulcrumed on the forward ortion of said frame and connected with the rear thereof and a draft member operating to lift the rear thereof and said frame.

rocking action of said frame on said axle sections and depress said traction wheels.

3. A traction englne comprising a frame having forward axle sectlons, and traction and guiding wheels therefor, hangers se-- cured to said frame and depending therefrom below said axlesections, a frame arranged beneath said first named frame and having a caster wheel at its rear end and supporting the correspondin end of said first named frame, and (Ira connections for attachment to said hangersythe strain of said draft connections on said first named frame tending to rock it on said axle as a fulcrum to raise the rear portion of said frame and increase the traction of said wheels.

rear portion of said super-structure frame on said axle as a fulcrum when the draft strain is applied to said draft bar.

5. A traction machine comprising aframe and axle and carrying wheels therefor, a superstructure frame journaled on sald axle.

meansconnecting said superstructure frame with said first named frame, a draft bar connected with said .superstructureframe beneath said axle and operatin to lift the rear portion of said superstructure frame on said axle as a fulcrum.

. 6. A traction machine comprising a frame having forward wheels and an axle therefor, a superstructure frame journaled on said-axle and connected at its rear. end with said wheel frame, draft means connected to said superstructure frame and operating to tilt it on its axle as a fulcrum when strain is applied to said draft means. 4

.7. A traction machine comprising a frame, a caster wheel supporting .the rear portion thereof, a super-structure frame, traction wheels and an axle therefor supporting the forward portion of both said frames, said super-'struct-lu'e frame having a sliding connection at its rear end with the corresponding end of said first named frame, and

.. 4. A traction engine comprising a frame,

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when strain is al plied thereto; said sliding connection engaging said first named frame to exert a lifting effect on it also when said super-structure frame has been tilted beyond a predetermined point. I

8. A traction machine comprising a frame having forward traction wheels and axle sections therefor and a rear guiding means,

a member journaled on said axle sectionsand havin anconnection with the rear portion of sai frame and a draft bar mounted to exert a downward pull on the forward portion of said member and an upward 'pull on the rear ortion thereof.

9. A traction machine comprising a frame having forward traction wheels anda rear 0 guiding means, a member fulcrumed at its forward end andhaving a connection at its rear end with said frame, and a draft means connected with the forward portion of said member for rocking the same on its fulcrum 5 and lifting therear ortion thereof.

In witness whereo I have hereunto set my hand this 20th day of February, 1915 NILS NILSON. Witnesses:

GENEVIEVE E. SonENsEN, EDWARD A. PAUL. 

